How do you do a hard reset on the 800w

I have lost some of the system sounds, like when the charger gets pluged in and unpluged and a few others. I thought a hard reset would take care of the problem but don't know how to do that. Soft resets do not work.

If the device is still responding and you happen to have an application that has the functionality to execute a soft reset, you can execute a hard reset just like you would when re-installing the battery - just press the red button when the device begins its soft reset.